Intent filter for files only

Question

in our app, we want to appear in the \"Share via\" menu. So we added this intent-filter to our activity :

Answer 1

1. If you want to be invoked for any mime type, don't place a single mine type in the filter
2. scheme="file" is the answer to run only on files. Now if the 3rd party applicaiton pass the data as content, then it is (by defiinition) not a file any more